Arc synchronous acquisition and image processing method for breaking test of low-voltage apparatus

Abstract

The invention discloses a low-voltage electric appliance breaking test arc synchronous acquisition method. The method comprises the following steps: controlling a low-voltage electric appliance and a power distribution module connected with the low-voltage electric appliance to be switched on; a control instruction is sent to the synchronous control circuit module and is used for controlling the low-voltage electric appliance to be switched off; an image acquisition module is controlled to synchronously acquire an opening arc image of the low-voltage electric appliance, the opening arc image is used for being uploaded to a computer module, and image enhancement is carried out by utilizing a wavelet transform method; and controlling the power distribution module to open, and ending synchronous acquisition. According to the invention, the low-voltage apparatus breaking test arc is synchronously collected and image enhancement processing technology is carried out, so that the arc collection success rate and stability in the low-voltage apparatus breaking test process are improved, the image processing precision is improved, electric power resources are saved, and technical support is provided for arc research in the low-voltage apparatus breaking test process; the safety performance of the low-voltage electrical apparatus is ensured, and safety production accidents caused by faults of low-voltage electrical equipment are avoided.

Description

technical field [0001] The invention relates to the field of voltage electrical disconnection test, in particular to a method for synchronous acquisition and image processing of low-voltage electrical disconnection test arcs. Background technique [0002] Low-voltage electrical appliances refer to the general term for low-voltage circuit breakers, contactors, isolating switches, electromagnetic starters, buttons, transfer switches, etc. and the electrical equipment composed of them as core components, which play a dual role of control and protection in the power system. The breaking capacity test is to assess whether the low-voltage electrical equipment can reliably break the fault current in the event of overload, short-circuit and other faults in the circuit. It is an important inspection item for the type test of low-voltage electrical equipment. The arc between the mechanical contacts at the moment of breaking delays the breaking time of the circuit. At the same time, th...

AI Technical Summary

Problems solved by technology

The arc between the mechanical contacts at the moment of breaking delays the breaking time of the circuit. At the same time, the high temperature generated by the arc may burn the contacts, which is manifested by increased contact resistance, transfer and erosion of contact materials, and reduced dielectric strength. Burn low-voltage electrical equipment, so the research on arc motion characteristics of low-voltage electrical breaking test will help improve arc extinguishing structure and safety performance

The existing method of arc image acquisition for low-voltage electrical breaking test has problems such as spatial resolution, poor synchronization between arc burning and acquisition, small number of acquired images, and low acquisition success rate.

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